Add elementwise test stub for logaddexp

Author: asmeurer

array_api_tests/test_elementwise_functions.py

@@ -398,6 +398,12 @@ def test_log2(x):
 def test_log10(x):
     a = _array_module.log10(x)
 
+@given(two_numeric_dtypes.flatmap(lambda i: two_array_scalars(*i)))
+def test_logaddexp(args):
+    x1, x2 = args
+    sanity_check(x1, x2)
+    a = _array_module.logaddexp(x1, x2)
+
 @given(two_boolean_dtypes.flatmap(lambda i: two_array_scalars(*i)))
 def test_logical_and(args):
     x1, x2 = args